{"action":"created","issue":{"url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/23","repository_url":"https://api.github.com/repos/LSSTDESC/DC2_Repo","labels_url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/23/labels{/name}","comments_url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/23/comments","events_url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/23/events","html_url":"https://github.com/LSSTDESC/DC2_Repo/issues/23","id":268848454,"number":23,"title":"Evaluate whether we need to update dust maps and tools for DC2 with the LSS, PC, and PZ groups","user":{"login":"cwwalter","id":5562740,"avatar_url":"https://avatars2.githubusercontent.com/u/5562740?v=4","gravatar_id":"","url":"https://api.github.com/users/cwwalter","html_url":"https://github.com/cwwalter","followers_url":"https://api.github.com/users/cwwalter/followers","following_url":"https://api.github.com/users/cwwalter/following{/other_user}","gists_url":"https://api.github.com/users/cwwalter/gists{/gist_id}","starred_url":"https://api.github.com/users/cwwalter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cwwalter/subscriptions","organizations_url":"https://api.github.com/users/cwwalter/orgs","repos_url":"https://api.github.com/users/cwwalter/repos","events_url":"https://api.github.com/users/cwwalter/events{/privacy}","received_events_url":"https://api.github.com/users/cwwalter/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2017-10-26T17:37:55Z","updated_at":"2017-10-29T23:31:05Z","closed_at":null,"author_association":"MEMBER","body":"Dear LSS, PC, and PZ groups,  \r\n\r\n( @erykoff @nregnault @slosar @damonge @sschmidt23 @morriscb could you please point this issue out to the relevant people who can answer if that person isn't you?)\r\n\r\nWe are making our way through the DC2 wishlists everyone presented at Stony Brook and there were a few things we needed some clarification on.  Could you help us with them?  Specifically, there were requests for new more realistic dust maps and tools to use them. Currently we are using the SFD integrated dust maps.   We were wondering:\r\n\r\n- Do the  photo-z and LSS group feel we need to update from the SFD integrated dust maps to Schlafly or something else?\r\n\r\n- Do you need less than <1 arcmin resolution in the integrated dust map?\r\n\r\n- Currently, each of line of site is assumed to be distributed with a smoothly varying analytic function.  We are wondering if this is OK for the PC group?  Are you planning on trying to use stellar photometry to map out the dust?\r\n\r\n- The LSS group asked to to be able to \"Query Dust Maps\".  The catalog will already have extincted and unextincted magnitudes.  Is this enough or do you need another external tool that will allow you to query the map?\r\n\r\nThanks!\r\n\r\n-Chris\r\n"},"comment":{"url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/comments/340312107","html_url":"https://github.com/LSSTDESC/DC2_Repo/issues/23#issuecomment-340312107","issue_url":"https://api.github.com/repos/LSSTDESC/DC2_Repo/issues/23","id":340312107,"user":{"login":"sschmidt23","id":11219330,"avatar_url":"https://avatars1.githubusercontent.com/u/11219330?v=4","gravatar_id":"","url":"https://api.github.com/users/sschmidt23","html_url":"https://github.com/sschmidt23","followers_url":"https://api.github.com/users/sschmidt23/followers","following_url":"https://api.github.com/users/sschmidt23/following{/other_user}","gists_url":"https://api.github.com/users/sschmidt23/gists{/gist_id}","starred_url":"https://api.github.com/users/sschmidt23/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sschmidt23/subscriptions","organizations_url":"https://api.github.com/users/sschmidt23/orgs","repos_url":"https://api.github.com/users/sschmidt23/repos","events_url":"https://api.github.com/users/sschmidt23/events{/privacy}","received_events_url":"https://api.github.com/users/sschmidt23/received_events","type":"User","site_admin":false},"created_at":"2017-10-29T23:31:05Z","updated_at":"2017-10-29T23:31:05Z","author_association":"NONE","body":"Similar to what Anze said, I think the PZ concerns were with systematics that might be induced if the assumed dust map was incorrect (e.g. spatially varying R_V that is not accounted for) and/or of finite resolution.  If a slightly incorrect dust map was part of DC2, then having truth, extincted, and unextincted (with slightly incorrect map) was along the lines of what we were thinking.  Is the PC group doing any work on the potential systematics induced by an incorrect dust map?\r\n\r\nAlso, note that at least for PZ, we could do these tests independent of DC2, making our own fake dust maps and testing impacts on photo-z stats, so it would not be a huge problem if DC2 used SFD."}}
{"actor":{"display_login":"sschmidt23"}}